Conducting and Superconducting Crystals Based on Some Unsymmetrical Donor Molecules

Recently, a number of conducting and superconducting salts based on unsym-metrical π-donor molecules have been prepared and studied (see [1–5]). In this paper the preparations, crystal structures and physical properties of some salts based on the unsymmetrical π-donors ethylenedioxyethylenedithiotetrathiafulvalene (1), ethylenedioxymethylenedithiotetrathiafulvalene (2), ethylenedioxyvinylenedithiotetrathiafulvalene (3) and methylenedithiotetrathiafulvalene (4) are described.